INLINE UINT8 ARG(i8008_state *cpustate)
{
UINT8 retVal = memory_raw_read_byte(cpustate->program, GET_PC.w.l);
GET_PC.w.l = (GET_PC.w.l + 1) & 0x3fff;
cpustate->PC = GET_PC;
return retVal;
}
void okim6295_device::data_write(UINT8 data)
{
// if a command is pending, process the second half
if (m_command != -1)
{
// the manual explicitly says that it's not possible to start multiple voices at the same time
int voicemask = data >> 4;
if (voicemask != 0 && voicemask != 1 && voicemask != 2 && voicemask != 4 && voicemask != 8)
popmessage("OKI6295 start %x contact MAMEDEV", voicemask);
// update the stream
stream_update(m_stream);
// determine which voice(s) (voice is set by a 1 bit in the upper 4 bits of the second byte)
for (int voicenum = 0; voicenum < OKIM6295_VOICES; voicenum++, voicemask >>= 1)
if (voicemask & 1)
{
okim_voice &voice = m_voice[voicenum];
// determine the start/stop positions
offs_t base = m_command * 8;
offs_t start = memory_raw_read_byte(space(), base + 0) << 16;
start |= memory_raw_read_byte(space(), base + 1) << 8;
start |= memory_raw_read_byte(space(), base + 2) << 0;
start &= 0x3ffff;
offs_t stop = memory_raw_read_byte(space(), base + 3) << 16;
stop |= memory_raw_read_byte(space(), base + 4) << 8;
stop |= memory_raw_read_byte(space(), base + 5) << 0;
stop &= 0x3ffff;
// set up the voice to play this sample
if (start < stop)
{
if (!voice.m_playing) // fixes Got-cha and Steel Force
{
voice.m_playing = true;
voice.m_base_offset = start;
voice.m_sample = 0;
voice.m_count = 2 * (stop - start + 1);
// also reset the ADPCM parameters
voice.m_adpcm.reset();
voice.m_volume = s_volume_table[data & 0x0f];
}
else
logerror("OKIM6295:'%s' requested to play sample %02x on non-stopped voice\n",tag(),m_command);
}
// invalid samples go here
else
{
logerror("OKIM6295:'%s' requested to play invalid sample %02x\n",tag(),m_command);
voice.m_playing = false;
}
}
// reset the command
m_command = -1;
}
INLINE int m4510_cpu_readop_arg(m4510_Regs *cpustate)
{
register UINT16 t=cpustate->pc.w.l++;
return memory_raw_read_byte(cpustate->space, M4510_MEM(t));
}